|
|
ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Published monthly
|
Basic crystallographic data and chemical character of the precursor of the vanadyl phosphate catalyst prepared in the medium of hydrochloric-acid
M. Brutovský and Š. Gerej
Department of Physical and Analytical Chemistry, Faculty of Natural Sciences,
P. J. Šafárik University, CS-04154 Košice
Abstract: The analysis of infrared spectra and X-ray diffractograms of the precursor of the vanadyl phosphate catalyst prepared in the medium of concentrated hydrochloric acid has enabled us to come to the conclusion that this species is vanadyl hydrogen phosphate crystallizing in the rhombic system with lattice parameters a = (9.71 ± 0.02) x 10-10m, b = (13.03±0.02) x 10-10m, and с = (13.96 ± 0.02) x 10-10 m, the volume of unit cell being V= 1766 x 10-30 m3 . The ratio n(P):n(V) = 1.1—1.2 is usually used for preparing the catalyst. Thus the precursor may generally be expressed as VОНР04.хН20. HзР04 .
Full paper in Portable Document Format: 425a589.pdf
Chemical Papers 42 (5) 589–593 (1988)
|